Diamond Cave Escape

Dream up a situation that your grandfather was a diamond digger. He had diary writing habit. He wrote all his experiences in his diary. After his death, you got a chance to read that diary and came to know a cave of diamonds existing. You had a wish to go to that diamond cave. After so many hurdles, you reached the diamond cave one day. After entering into it, the door gets locked. As you don‘t know how to open it, you need to find the necessary objects to solve the puzzles. As you are the person of problem solving nature, surely you will achieve it.